Demonstrators at Los Angeles International Airport on Jan. 28, 2017, protest a temporary ban on Muslim immigration. Polls show Americans increasingly are concerned about terrorism committed in the name of Islam and question whether Muslim values conflict with U.S. values. But surveys indicate that more than half of Americans know little about Islam. (Getty Images/Anadolu Agecny/Aydin Palabiyikoglu)

Hate crimes against Muslims have been on the rise in recent years. A string of attacks by Islamist extremists has terrorized the United States and Europe, and anti-Muslim rhetoric during the 2016 presidential campaign by then-candidate Donald Trump and some of his supporters has helped create an anti-Muslim climate in the United States. Polls indicate that Americans have growing concerns about Muslim values and Islamist extremism, although surveys show that U.S. Muslims are a diverse community with values generally in line with those of most Americans. The nation's 3.3 million Muslim population is expected to grow to 8 million by 2050, and Islam will have surpassed Judaism as America's largest non-Christian faith. But most Americans say they know little about Islam and haven't had much contact with Muslims. Meanwhile, protests have erupted over a temporary ban ordered by Trump on travelers from six predominantly Muslim countries, and anti-Muslim groups have staged rallies — met with counterprotests — alleging that Muslims want to impose Islamic law in the United States.